Inspection Ports | McMaster-Carr

	Pipe Size Pipe Size

1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
3
4
6

	Thread Type Thread Type

UN/UNF (SAE Straight)

	Panel Material Panel Material

	Material Material

	System of Measurement System of Measurement

Inch

Metric

	For Cutout Diameter For Cutout Diameter

	Mounting Style Mounting Style


Surface	Recessed

	Mounting Location Mounting Location

	Shape Shape

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Mount Type Mount Type

	Maximum Temperature Maximum Temperature

	For Use With For Use With

Acetic Acid

Air

Alcohol-Based Solvents

	Frame Material Frame Material

	Window Diameter Window Diameter

	Maximum Pressure Maximum Pressure

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	For Liquid Type For Liquid Type

Dark

Clear

	Minimum Temperature Minimum Temperature

	For Cutout Width For Cutout Width

	Window Material Window Material

Glass

Plastic

Quartz

	Connection Style Connection Style

Threaded

Flanged

Quick Clamp

	Overall Diameter Overall Diameter

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

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354 Products

Access Panels and Ports

Surface-Mount Access Ports

Gasketed Access Ports

Designed for use with circular cutouts, these panels have gaskets that form a tight seal to keep out dust and moisture.

Tank and Hopper Access Ports

Install on circular cutouts to access and inspect the interior of tanks and hoppers.

Access Ports for Insulated Pipes

These flexible ports are often used to inspect insulated pipes and tanks for corrosion.

Tank and Hopper Access Panels

Use these rectangular panels to access and inspect the interior of tanks and hoppers.

Sights

These sights have a glass window.

Easy-View All-Plastic Sights

Machined from one piece of stain- and impact-resistant plastic.

Easy-View Sights

View tank contents from multiple angles through the plastic domed window.

High-Visibility Sights

Easily view liquid movement and level changes from a distance—these sights have an indicator ball inside the glass window.

Shatter-Resistant Sights

The window and body are made from a single piece of plastic, making these sights more shatter resistant than sights with a glass window.

Sights for Oil Inspection

Continuously monitor oil quality through the clear plastic reservoir, and use the attached drain valve to remove water accumulation.

High-Pressure Sights

With a thick glass window fused to a metal body, these sights resist cracking at high pressures.

High-Temperature Sights

Often used in kilns and other heating equipment, these sights have a quartz window that can withstand temperatures up to 1600° F. They're also known as peep sights.

Weld-On Sights

Weld these sights to single-wall tanks.

Flanged Sights

Fasten the extended flange to tank walls.

Through-Wall Sights

Mount these sights from the inside of your tank and secure with a lock nut.

Sights for Quick-Clamp Sanitary Tube Fittings

Monitor food, brewery, chemical, pharmaceutical, and biotech processing lines with these sights that attach to quick-clamp fittings for fast installation and easy removal for cleaning.

Press-Fit Through-Wall Sights

Press these sights into a hole in your tank wall; no additional mounting nuts are needed. They mount from the outside.

High-Vacuum Flanged Sights

Add a window to your high-vacuum system. With a pane of glass sealed inside a high-vacuum CF flange, these sights bolt onto vacuum chambers, tee fittings, and manifolds.

High-Vacuum Sights for Quick-Clamp Fittings

Designed with quick-clamp (KF) connections, these sights connect to a port on a high-vacuum chamber, so you can monitor what's happening inside.

Duct Access Panels

Quick-Open Duct Access Panels

The panels open and close by turning the knobs.

Duct Access Panels

Also known as cleanouts, panels cover cutouts in duct to provide access for inspection and cleaning.

Pipe, Tubing, Hose, and Fittings

High-Pressure Stainless Steel Bleed Rings

To relieve pressure, siphon liquid, or take samples in lines where corrosion is a concern, these bleed rings act as a port between two pipe flanges in systems operating up to 1,200 psi. They're stainless steel, so they resist rusting.

Low-Pressure Stainless Steel Bleed Rings

Create an access point in systems operating up to 230 psi where corrosion is a concern. Made of stainless steel, these bleed rings resist rusting.

Low-Pressure Steel Bleed Rings

Access the inside of lines operating up to 285 psi, so you can vent pressure, drain liquid, or take samples. Made of black-coated steel, these bleed rings should be used in dry environments to prevent rusting.

High-Pressure Steel Bleed Rings

Tap into your line in systems operating up to 1,400 psi to vent pressure, drain liquid, or take samples. Made of black-coated steel, these bleed rings should be used in dry environments to prevent rusting.

Sanitary Sampling Stainless Steel Tube Fittings

Take samples in sanitary environments—these tube fittings won’t contaminate your lines or force you to pause them.

Sanitary Lights for Quick-Clamp Fittings

Attach these lights in one of the quick-clamp ports for a clear view of what's inside tanks, filters, and other closed containers used in brewery, pharmaceutical, and food-processing lines.